Author Topic: I am building something ambitious  (Read 229 times)

Granny Gremlin

  • Hero Member
  • *****
  • Posts: 2351
    • View Profile
    • Granny Gremlin home page
Re: I am building something ambitious
« Reply #15 on: February 02, 2018, 08:24:50 AM »
At least 13.

I am building one of these:



Which is basically a Champ with a line out to feed another amp; an OD preamp sort of thing (but can still use it as an amp too).  The main change I am making is adding the infamous (up here anyway) Stinger fuzz circuit (as found on the larger Garnet amps in the early period) ... and relay switching for general bypass as well as the Stinger.

Queue Uwe with the Randy Bachman jokes.
Robert Plant and Jimmy Page (drummer and bassist of Deep Purple, Jake!)

Highlander

  • Hero Member
  • *****
  • Posts: 11945
  • Brexit...? Next they'll be wanting independence...
    • View Profile
Re: I am building something ambitious
« Reply #16 on: February 02, 2018, 02:07:39 PM »
What Randy Bachman jokes...?
Staring at the event horizon is a dirty job, but someone has to do it...

doombass

  • Hero Member
  • *****
  • Posts: 575
    • View Profile
Re: I am building something ambitious
« Reply #17 on: February 02, 2018, 03:12:23 PM »
We don't need Uwe to make any jokes (though I love his wits) when Randy himself is being funny enough for himself sharing his . Out of curiousity I did some read up on Garnet and its Randy Bachman history quoted by the man himself (which is entertaining if you know the technical side of a tube output stage that is):

Gar and I developed this unit together back in '65-'66. Growing up playing violin, I loved the sustain, especially of a viola or cello. So early on in the mid '60's, I found out that by plugging a small amplifier into a bigger amplifier, I could get this sound. Now I was taking the power out, which normally would go to the speaker and plugging it into the input of another amp. The result, for a few short minutes was a cool, great new sustained sound. Gar Gillies had a tv/radio repair shop, was a cool musician, and I wasn't embarrassed to take in my amps, which were literally burned by the power misuse; fried, to say the least. Gar asked what the heck I was doing, and when I told him, he said, you're insane to do this, its very dangerous. So he offered to help me do it a safer and less destructive way. Gar proceeded to build me a tube pre-amp, which when put into another amp, got me the desired sound.

I've always been struck by the guitar sound of American Woman but never investigated what equipment was involved making it. This makes your project even cooler Jake.

Granny Gremlin

  • Hero Member
  • *****
  • Posts: 2351
    • View Profile
    • Granny Gremlin home page
Re: I am building something ambitious
« Reply #18 on: February 02, 2018, 04:24:52 PM »
Yeah... I've only ever actually heard that story as told by Gar Gillies; basicially the same but with more explatives.

Anyway, I have learned that power tube (tetrode/pentode) distortion is what I like best - e.g. all my favorite mic preamps have a pentode in them, not just the same old 12A whatevers.  Also the key is not driving the snot out of a triode but overdriving multiple cascaded gain stages.  Tet/Pentodes get you there in fewer stages than triodes - dunno why, they just do.

The Herzog, being the Champ circuit, has a 6V6 tetrode in it (and you can dime it - the line has an attenuator).  Adding the Stinger fuzz puts another triode as well as another pentode (6AN8 tube, which I love the sound of - I have other gear using those) in the circuit so I am really thinking this will be the one; my ultimate dirt machine.
« Last Edit: February 02, 2018, 05:48:29 PM by Granny Gremlin »
Robert Plant and Jimmy Page (drummer and bassist of Deep Purple, Jake!)

clankenstein

  • Hero Member
  • *****
  • Posts: 849
  • flouser trapping low notes
    • View Profile
Re: I am building something ambitious
« Reply #19 on: February 02, 2018, 09:17:23 PM »
Most interesting.The relay switching sounds like a good idea too.When i lived in London i ran the line(attenuated speaker)output of my laney lc15r in to a jcm800 marshall,That was a great guitar sound!
You just can't believe everything you see and hear now can you?